Easy way to find the square of number from 30 to 79 Step 1:Find how many more or less the given number is from 50. Step 2:Add the number to 25 if more than 50 or subtract the number from 25 if less than 50. Step 3:Then find the square of the number added or subtracted and […]

Easy method to mentally find the cubroot of any 5 or 6 digit number Step 1:Find the cuberoot of the last digit. Step 2:Strike out the 3 digits from right. Step 3:For the first 2digits find the nearest cube to the number & put the number. Points to be remebered while using this method. […]

Step 1:Multiply the ten’s digit number with its immediate next number.This will be the 1st digit of the answer. Step 2:Put 25 next to the result of step 1. Example: (35)2=? Step 1: 3 is the ten’s digit in the given number 35.Immediate next number to 3 is 4. Hence,by multiplying 3 & 4 we […]

Lets us consider someone working for you seven days. You have a Gold bar to pay him. You must pay the worker for their work at the end of every day. If you are only allowed to make two breaks in the gold bar, how do you pay your worker? (Assuming equal amount of work […]

By this You can orally calculate Square of the number within 10 Seconds. Let us first find square of 12 using formula: 12’square=12+2/2’square=14/4=144. The formula is self explanatory. • 12 is more than 10. • We add 2 to 10 to get 12. • So let’s add 2 to 12 and after slash take square […]

This is a trick to get square of a two digits numbers. Square both the digits individually and place them together. Then multiply both the digits with 20 and add this result to the previous number and get the answer. e.g. 28 2’square =4 and 8’square=64 placing together means 464 then add 2x8x20 to it. i.e. 464+320=784 is […]