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Two complete sets show the rule. Use it to fill in the brackets in the third.
Question 1 of 12
(2 [12] 10) (2 [6] 4) (3 [?] 11) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 2 and 10 give 12; in the second, 2 and 4 give 6. In both, the number in the brackets is the two outside numbers added together. Doing the same to 3 and 11 gives 14. Look at the size of the number in the brackets: much bigger than the outside numbers usually means multiplying.
The answer is B. Use the two complete sets to find the rule, then check it before you use it. In the first, 2 and 10 give 12; in the second, 2 and 4 give 6. In both, the number in the brackets is the two outside numbers added together. Doing the same to 3 and 11 gives 14. Look at the size of the number in the brackets: much bigger than the outside numbers usually means multiplying.
(7 [77] 11) (11 [77] 7) (10 [?] 5) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 7 and 11 give 77; in the second, 11 and 7 give 77. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 10 and 5 gives 50. Write the rule down in words before you work out the answer.
The answer is B. Use the two complete sets to find the rule, then check it before you use it. In the first, 7 and 11 give 77; in the second, 11 and 7 give 77. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 10 and 5 gives 50. Write the rule down in words before you work out the answer.
(11 [132] 12) (3 [6] 2) (6 [?] 8) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 11 and 12 give 132; in the second, 3 and 2 give 6. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 6 and 8 gives 48. Write the rule down in words before you work out the answer.
The answer is D. Use the two complete sets to find the rule, then check it before you use it. In the first, 11 and 12 give 132; in the second, 3 and 2 give 6. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 6 and 8 gives 48. Write the rule down in words before you work out the answer.
(11 [4] 7) (12 [8] 4) (8 [?] 1) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 11 and 7 give 4; in the second, 12 and 4 give 8. In both, the number in the brackets is the two outside numbers the right number taken from the left one. Doing the same to 8 and 1 gives 7. If adding does not work, try multiplying, then try taking one from the other.
The answer is C. Use the two complete sets to find the rule, then check it before you use it. In the first, 11 and 7 give 4; in the second, 12 and 4 give 8. In both, the number in the brackets is the two outside numbers the right number taken from the left one. Doing the same to 8 and 1 gives 7. If adding does not work, try multiplying, then try taking one from the other.
(4 [36] 9) (10 [80] 8) (11 [?] 3) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 4 and 9 give 36; in the second, 10 and 8 give 80. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 11 and 3 gives 33. Always test your rule on the second set before using it on the third.
The answer is D. Use the two complete sets to find the rule, then check it before you use it. In the first, 4 and 9 give 36; in the second, 10 and 8 give 80. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 11 and 3 gives 33. Always test your rule on the second set before using it on the third.
(3 [18] 6) (2 [22] 9) (5 [?] 12) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 3 and 6 give 18; in the second, 2 and 9 give 22. In both, the number in the brackets is the two outside numbers added together and then doubled. Doing the same to 5 and 12 gives 34. If adding does not work, try multiplying, then try taking one from the other.
The answer is D. Use the two complete sets to find the rule, then check it before you use it. In the first, 3 and 6 give 18; in the second, 2 and 9 give 22. In both, the number in the brackets is the two outside numbers added together and then doubled. Doing the same to 5 and 12 gives 34. If adding does not work, try multiplying, then try taking one from the other.
(4 [48] 12) (10 [80] 8) (4 [?] 10) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 4 and 12 give 48; in the second, 10 and 8 give 80. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 4 and 10 gives 40. Write the rule down in words before you work out the answer.
The answer is C. Use the two complete sets to find the rule, then check it before you use it. In the first, 4 and 12 give 48; in the second, 10 and 8 give 80. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 4 and 10 gives 40. Write the rule down in words before you work out the answer.
(9 [108] 12) (11 [121] 11) (7 [?] 10) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 9 and 12 give 108; in the second, 11 and 11 give 121. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 7 and 10 gives 70. If adding does not work, try multiplying, then try taking one from the other.
The answer is B. Use the two complete sets to find the rule, then check it before you use it. In the first, 9 and 12 give 108; in the second, 11 and 11 give 121. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 7 and 10 gives 70. If adding does not work, try multiplying, then try taking one from the other.
(12 [6] 6) (7 [5] 2) (7 [?] 3) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 12 and 6 give 6; in the second, 7 and 2 give 5. In both, the number in the brackets is the two outside numbers the right number taken from the left one. Doing the same to 7 and 3 gives 4. Always test your rule on the second set before using it on the third.
The answer is A. Use the two complete sets to find the rule, then check it before you use it. In the first, 12 and 6 give 6; in the second, 7 and 2 give 5. In both, the number in the brackets is the two outside numbers the right number taken from the left one. Doing the same to 7 and 3 gives 4. Always test your rule on the second set before using it on the third.
(12 [22] 10) (5 [10] 5) (4 [?] 9) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 12 and 10 give 22; in the second, 5 and 5 give 10. In both, the number in the brackets is the two outside numbers added together. Doing the same to 4 and 9 gives 13. Always test your rule on the second set before using it on the third.
The answer is C. Use the two complete sets to find the rule, then check it before you use it. In the first, 12 and 10 give 22; in the second, 5 and 5 give 10. In both, the number in the brackets is the two outside numbers added together. Doing the same to 4 and 9 gives 13. Always test your rule on the second set before using it on the third.
(10 [120] 12) (3 [18] 6) (7 [?] 10) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 10 and 12 give 120; in the second, 3 and 6 give 18. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 7 and 10 gives 70. Always test your rule on the second set before using it on the third.
The answer is C. Use the two complete sets to find the rule, then check it before you use it. In the first, 10 and 12 give 120; in the second, 3 and 6 give 18. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 7 and 10 gives 70. Always test your rule on the second set before using it on the third.
(9 [17] 8) (4 [11] 7) (8 [?] 6) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 9 and 8 give 17; in the second, 4 and 7 give 11. In both, the number in the brackets is the two outside numbers added together. Doing the same to 8 and 6 gives 14. Write the rule down in words before you work out the answer.
The answer is E. Use the two complete sets to find the rule, then check it before you use it. In the first, 9 and 8 give 17; in the second, 4 and 7 give 11. In both, the number in the brackets is the two outside numbers added together. Doing the same to 8 and 6 gives 14. Write the rule down in words before you work out the answer.
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