Would you get hired by an Investment Bank? Solve this without using Excel or a calculator 👇
Problem:
What is the sum of the numbers from 1 to 100?
Solution:
Pair the numbers from the outside in:
1 + 100 = 101
2 + 99 = 101
3 + 98 = 101
You get 50 pairs, and each pair sums to 101.
50 × 101 = 5,050
If this took you longer than it should have, that’s the point — finance interviews reward pattern recognition, not memorization.
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