Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-5470-145
+91 7353221155
Use Coupon: CART20 and get 20% off on all online Study Material
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
OTP to be sent to Change
Find the cube of 728 ( 728³= ? )
Step 1 : Split the number as like i.e 7 – 28 or 72 – 8.
Here we take 72 – 8 .
Step 2 : Divide the 1st part by 2nd part. i.e 72/8 = 9. Here we can take a = 8 , b= 9 , c = 8³ = 512
Step 3 : Cube of 1st part c = 8 x 8 x 8 = 512. Here Take last digit in answer and remaining value 51 to be add to next step.
i.e Ans : _ _ _ _ 2 and 51 is to be add in the next step.
Step 4 : 3 bc + 51= (3 x 9 x 512) +51= 13824 + 51 = 13875 . Here Take lost digit into the next digit in answer and remaining value 1387 to be add to next step.
i.e Ans : _ _ _ 5 2 and 1387 is to be add in the next step.
Step 5 : 3 b² c +13875= (3 x 9 x 9 x 512) +1387= 124416 + 1387 = 125803 . Here Take lost digit into the next digit in answer and remaining value 12580 to be add to next step.
i.e Ans : _ _ _3 5 2 and 12580 is to be add in the next step.
Step 6 : b³ c +12580= ( 9 x 9 x 9 x512) +12580= 373248 + 12580 = 385828. Here Take this value into the answer
i.e Ans : 385828352.
Get your questions answered by the expert for free
You will get reply from our expert in sometime.
We will notify you when Our expert answers your question. To View your Question
Win Gift vouchers upto Rs 500/-
Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today !