In a four-digit number, digit at ten's place is 4, digit at unit's place is one - fourth of ten's place digit, digit at hundred's place is 0, digit at thousand's place digit is double the digit at ten's place. Write the number.
According to the question,
Digit at tens place =4
Digit at units place = 14 of tens place digit = 14 x 4 = 1
Digit at hundreds place = 0
Digit at thousands place = 2 x Digit at tens place = 2 x 4 = 8
Required number = 8041