Quant Question Of The Day: 190
Numbers
Given that the units digit of 14 × N is same as the tens digit of 20 × M. If the unit’s digit of 3 × N is 8, then what is the unit’s digit of 4 × M?
Given that the units digit of 14 × N is same as the tens digit of 20 × M. If the unit’s digit of 3 × N is 8, then what is the unit’s digit of 4 × M?
Suppose N = 10x + y Units digit of 3N = 8. Therefore units digit of N = 6. Or y = 6. N = 10x + 6 Or 14N = 140x + 84 Or units place of 14N = 4. Tens digit of 20M = Units digit of 2M. Or Units digit of 2M = 4 Or Units digit of 4M = 8.
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