Perform no-calculator math accurately and fast
Overview
This question evaluates mental arithmetic, rapid estimation, numerical bounds, and familiarity with exponentials and square-root approximations within the Statistics & Math category for a Data Scientist role.
Shopify
Oct 13, 2025, 9:49 PM
Data Scientist
Technical Screen
Statistics & Math
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Technical Screen: Mental Math and Estimation
Solve quickly without a calculator. For each, show the brief mental shortcut you use.
Problems
- (a) 37 × 43
- (b) 999 × 997
- (c) 65^2
- (d) Approximate (1.07)^5 to within 0.005
- (e) Provide tight two-sided bounds for e^{0.3} and justify them
- (f) √998,001
Solution
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