One child was reading aloud the numbers from 1 to 99. Another child was reading aloud backwards from 99 to 1. They were calling the numbers simultaneously. It was observed that at a certain time both read out the same number. Which number it was?
Answers
It's pretty obvious tho
50
Solution :-
→ When first child reads 1 , other child reads = 99 = 1 + 99 = 100
→ When first child reads 2 , other child reads = 98 = 2 + 98 = 100
→ When first child reads 3 , other child reads = 97 = 3 + 97 = 100
→ When first child reads 4 , other child reads = 96 = 4 + 96 = 100
so on,
Since sum of both students reading is 100 .
say the certain number both reads out was x .
then,
→ x + x = 100
→ 2x = 100
→ x = 50 (Ans.)
Hence, the required number was 50 .
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