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31 × 711. 24312. 22713. 22014. 22415. None of these. |
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Answer» Correct Answer - Option 3 : 2201 Concept used:- Trick to multiply two digit numbers ending in 1. Method:-
Calculation:- Let the product be AB1 A = 3 × 7 = 21 B = 3 + 7 = 10 AB1 = 21|10|1 Carryover of B (10) is shifted and added to 21. Hence, 2201 is our answer. |
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