How Many Pluses

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?




Similar Math Riddles

Can you solve this tricky maths equation problem by replacing it? mark with the correct symbol?

19834 -----: 187
15921 -----: 153
17561 -----: 139
13734 -----: ???

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I am an odd number. Take away a letter and I become even. What number am I?

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The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

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Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

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You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

Cube Game

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What does this mathematical rebus means ?

Maths Riddle

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Find three whole, positive numbers that have the same answer when multiplied together as when added together.

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Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

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There is a number which when you multiply by 3 and subtract 2 from the result, then the resulting number is the reverse of the actual number.

What is the smallest number that stands true on the statement?

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Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

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There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.