Mental Maths Class 5 Playing with Numbers

Asked by AKSHAY GURU VARADHARAJAN · SRI CHAITANYA TECHNO SCHOOL, JAYANTI NAGAR.

In each of the 5 numbers below, the digits in the hundreds and tens places are interchanged. What will be the middle digit of the third largest number?

345, 721, 864, 173, 212

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Answer: A. 3

Swap digits: 345→435, 721→271, 864→684, 173→713, 212→122.
Order them: 713 (1st), 684 (2nd), 435 (3rd).
The third largest number is 435.
The middle digit of 435 is 3.
The answer is A. 3.

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In each of the 5 numbers below, the digits in the hundreds and tens places are interchanged. What will be the middle digit of the third largest number? 345, 721, 864, 173, 212

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In each of the 5 numbers below, the digits in the hundreds and tens places are interchanged. What will be the middle digit of the third largest number?

345, 721, 864, 173, 212