Consecutive Multiples

Fast trick to find consecutive multiples

Q .Find the unit digit in (379 * 553 * 553 ).

STEP 1 :

As we know to calculate unit digit first of all we calculate 4 multiples of the numbers

so divide the power of the numbers with 4-

if we divide 79 with 4 then reminder will be 3 so the 3 multiple value of 3 is 27

so unit place for 379 = 7

if we divide 53 with 4 then reminder will be 1 so the 1 multiple value of 5 is 5

so unit place for 553 = 5

if we divide 53 with 4 then reminder will be 1 so the 1 multiple value of 5 is 5

so unit place for 553 = 5

STEP 2 :

Now multiply above calculated unit digit to calculate the final unit digit-

7 * 5 * 5 = 175

Unit digite is 5