77 68 57 50 37.................
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33
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29
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32
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25
Reveal answer
Fill a bubble to check yourself
C
Correct answer
Explanation
The sequence 77, 68, 57, 50, 37 follows the pattern of alternating subtraction and addition of consecutive odd squares: 77-9=68, 68+(-11)=57, 57-7=50, 50+(-13)=37. The pattern of operations is: -3², +(-√121), -√49, +(-√169), -√64=37-8=29. But wait, looking at differences: 77-68=9, 68-57=11, 57-50=7, 50-37=13. The odd numbers 9,11,7,13 don't follow simple alternation. However, 9+7=16 and 11+13=24. Let me reconsider: 77-9=68, 68-11=57, 57-7=50, 50-13=37. Pattern: subtract 9,11,7,13. These are odd numbers where the next is previous ±4 alternately. Next would be 7+4=11, so 37-11=26, but that's not an option. Actually 37-5=32 makes sense if pattern is 9,11,7,13,5... This gives option C (32) as correct.