Any Number × 15
No. 0 × 15
★ Increase 0 left to the number and add half of this number.
★ this is your answer
24 × 15
240 Write 0 left to 24 it will be 240
+ 120 Write half of 240 it will be 120
360 (Add 240 & 120 it will be 360)
Logic
24 × 15
= 24 × (10 + 5)
= 24 × 10 + 24 × 5
= 24 × 10 + 24 × 5×2/2
= (No. 0) + 24 × 10/2
= (No.0) + (Half of No.)
= 240 + 24 × 10/2
= 240 + 240/2
★1. The logic tales that first of all we multiply by 10 to increase 0 to the given number and in second step
★2. We will multiply by 5 so that we multiply by 10 and divide it by 2 which will be exact half of the given number.
360 × 15 = 5400
Increase 0 in 360 = 3600
Half of 3600 = 1800
Sum of above. = 5400
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