What is the average of all integers from 1 to 100 that end in 4?

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Official Explanation

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To find the average of all integers from 1 to 100 that end in 4, we first identify those integers: 4, 14, 24, 34, 44, 54, 64, 74, 84, 94. These numbers form an arithmetic progression (AP) with 10 terms. The average…

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Comments

EndeOct 1, 2024

thanks for the answer

PrashantApr 26, 2024

Great question!

What this question tests

What it tests

Your command of divisibility, primes, factors, parity, and how the GMAT tests properties of integers.

Common trap

Forgetting that 1 is not prime, that 0 is divisible by every integer, or that negative numbers flip your assumptions.