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Mathematical reasoning

How to solve a hard number system question for CAT confidently and quickly 8

thumb how to solve hard cat number system problem confidently 8

The leftmost digit of a natural number at least 7 digit long is 3. When the leftmost digit is dropped, the number formed by the rest of the digits becomes $\frac{1}{5}$th of the original number. What is the product of the non-zero digits of the original number?

Hint: Solve this 8th hard number system question for CAT using the very basic concepts intelligently.

How to solve a hard number system question for CAT confidently and quickly 7

thumb how to solve hard cat number system problem confidently and quickly 7

Cube of a number exceeds its product with two other numbers by 2, the cube of the second number is less than their product by 3 and the cube of the third exceeds their product by 3. Find the lowest of the three numbers.

Solve this 7th hard number system question for CAT quickly by mathematical reasoning based on indices concepts and inequality analysis.

How to solve a hard number system question for CAT confidently and quickly 6

thumb how to solve hard cat number system problem confidently 6

The product of a two digit number and a second number formed by reversing the digits of the first is 2430. Find the lower number. In solving this 6th hard number system question for CAT, mathematical reasoning based on factors multiples concept provided quick systematic solution...

How old is Mommy - Puzzling Problem on Ages Solved in Easy Steps by Systematic problem solving

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The difference of ages of two children and the sum of the squares of their ages are given. The mother's age can be formed by placing squares of the ages of the two children one after the other forming a 4-digit number. Such a problem hides key patterns that, if discovered, give you the solution immediately...

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