There are only two single-digit numbers where one is 1/5 of the other. Those are 1 and 5 and they become the outside numbers. From there, it's relatively easy to multiply 5 by 3 to get 15 for the inside numbers.
Suppose the four digit number is abcd. The only digit which is divisible by 5 is 5 and so d = 5.So abcd = abc5
Then a is d/5 = 5/5 = 1.
So abcd = 1bc5.
Finally bc = d*3 = 5*3 = 15
and so abcd = 1155.
14 x (1 + 4) = 14 x 5 = 70
815*537 = 2.56*1039 in standard form Therefore it will have 40 digits.
Any prime numbers of about 66 or 67 digits will do.
1155
Yes. But that is true only if the 100 digits do not include 0. Or, if 0 is included, then you consider "0n0" to be a three digit number. Most people would consider is to be a 2-digit number.
Find a four digit number whose digits will be reversed when multiplied by nine?
When a number is multiplied by itself, its product is called its exponent. When a number is multiplied by itself 30 times, this is the number's 30th exponent, or its 30th power. Two multiplied by two 30 times is 1,073,741,824. It has 10 digits.
36 is twice the product of its digits multiplied. 3 times 6 equals 18, and 18 times 2 equals 36.
Six.
The new prime number, 2 multiplied by itself 57,885,161times, less one, has 17,425,170 digits.
The number is 21978. 21978 when multiplied by 4 which gives the result 87912 which is in reverse order.
If the original number was even, the ones place will be zero; otherwise it will be 5.
A two digit number whose two digits added together equal 42 and multiplied together equal 82
Count the number of digits after the decimal point in the first number being multiplied. Count the number of digits after the decimal point in the second number being multiplied. Add the two numbers. This is the number of digits after the decimal point in the answer. But make sure that any trailing 0s are included. To calulate 0.42 * 3.451: 41*3451 = 144942 Digits after point in first number = 2 Digits after point in second number = 3 2 + 3 = 5 So digits after point in answer = 5 So answer = 1.44942 But To calulate 0.42 * 3.45: 42*345 = 14490 <<< it is vital that the last 0 here is kept till the last stage. Digits after point in first number = 2 Digits after point in second number = 2 2 + 2 = 4 So digits after point in answer = 4 So answer = 1.4490 = 1.449
14 x (1 + 4) = 14 x 5 = 70
815*537 = 2.56*1039 in standard form Therefore it will have 40 digits.
Any prime numbers of about 66 or 67 digits will do.