How do you evaluate #55+57+58+61+63#?

2 Answers
Jun 21, 2017

Answer:

The answer to #55+57+58+61+63# is #294# and further explanation is down below!

Explanation:

The way we are going to evaluate this problem is going to be like, add first 2 numbers and add the answer to that to the next number and so on. Kind of like a pattern! I hope that makes sense, but if it doesn't, I hope you'll get it soon! :)

OK, now let's start!

#55+57= 112#

Now add #112# to the next number in the expression. Like,

#112+58= 170#!

You keep doing that till you are finished with all of your numbers!

#170+61= 231#

#231+63= 294#

There you go! The answer is 294 and I hope that you now understood the "pattern" that I used instead of adding all of them together at the same time! I hope that this answer helps you! :)
My source is my mind!

Jun 25, 2017

Answer:

The answer is #294#. The explanation is given below.

Disclaimer: A bit different technique is used below.

Explanation:

My technique is:

As you can see that all the terms in the given problem are near or equal to #55#.

So I say that just multiply the number #55# as a number of times as there are the digits i.e., #5#.

On multiplying #55xx5 = 270#

You get #270#.

Now calculate every term is how much greater than #55#.

You see that;

  • #55 - 55 = 0#
  • #57 - 55 = 2#
  • #58 - 55 = 3#
  • #61 - 55 = 6#
  • #63 - 55 = 8#

Now just simply add the sum of these differences to the product of #55# and #5# i.e., #270#.

#19 + 270 = 294#.

This is the answer.

This procedure might look complicated but is a matter of seconds when you actually think about it.