Home
Class 12
MATHS
A four digit number is called a doublet ...

A four digit number is called a doublet if any of its digit is the same as only one neighbour. For example, 1221 is a doublet but 1222 is not. Number of such doublets are

Promotional Banner

Similar Questions

Explore conceptually related problems

A two digit number is four times sum of its digits.The number is three times product of the digits. Find the number.

If two digit number is four xx the sum of its digits and twice the product of digits.Find the number.

The number of all four digit numbers with distinct digits is

A pair of fair dice is rolled 2 times. Find the mean of the number of doublets on the dice. Find also variance of the number of doublets on the dice.

A pair of fair dice is rolled 2 times. Find the mean of the number of doublets on the dice. Find also variance of the number of doublets on the dice.

In a simultaneous thrown of a pair of dice, find the probability of getting: 8 as the sum (ii) a doublet a doublet of prime number a doublet of odd number

Write the greatest 6-digit number, using any four different digits.

A six-digit number is formed by repeating a three-digit number. For example 256256, 678678, etc. Any number of this form is divisible by