The sum of the 5 consecutive two digit odd numbers when divided by 10 becomes a perfect square, which of the following can be one of these 5 numbers?
Correct answer: C
Explanation
perfect square:- 1,4,9,16,25,36
sum=square*10=10,40,90,160,250,360
sum of 4 odd consecutive numbers is multiple of 4
so the only number left are 40,160,360
sum/4=40/4=10 is not possible
sum/4=360/4=90 is not possible
sum/4=160/4=40 is the only option available i.e 41
C
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AQuA-RAT items are crowdsourced algebra problems, not ACT questions. They carry five answer choices in the pre-2025 ACT Mathematics style and no ACT reporting category. Useful for drilling Preparing for Higher Math content; not a substitute for a real form.