Correct Answer - Option 1 : 1575
Concept used :-
Trick to multiply two numbers ending in 5 with difference of 10 between them.
Method :-
- Write 75 at the end.
- Add 1 to ten’s place of the bigger number.
- Now multiply the increased digit with the ten’s digit of the smaller number.
- Write the product so obtained on the left side of 75
Calculation :-
Let the answer be A75.
A = (4 + 1) × 3 = 15 (using step 2 and 3)
Hence, 1575 is our answer.
