How many 4 digit numbers ABCD exist?

How many 4 digit numbers ABCD exist?

480. Hint: Take each digit separate and look for the values which satisfy the conditions. Note: Similar problems including combination of conditions can be asked. In that case, the above method is best suited.

What 4 digit number multiplied by 4 is itself backwards?

The Number is 2178. 2178 * 4 = 8712. 8712 is the reverse of 2178. Since it’s 4 Digit Number and since after multiplication also it has to be a 4 Digit Number, it’s easy to see that the Number has to be less than 2500 since 2500 * 4 = 10000.

How many numbers are ABCD?

The English Alphabet consists of 26 letters: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z.

What is a grade 4 in letters?

A grade 4 is broadly equivalent to a C grade. A 3 would be broadly similar to a D grade, with 2 and 1 taking in grades E, F and G.

What’s a Level 4 in GCSE?

Equivalent GCSE grades The Government has said that grade 4 is a ‘standard pass’. Grade 5 is a ‘strong pass’ and equivalent to a high C and low B on the old grading system. Grade 4 remains the level that students must achieve without needing to resit English and Maths post-16.

When 4 times a number is added to the square?

Let the required number be x. Then, four times the number is 4x. Hence, the required number is 8.

What is the value of D in ABCD 2 times 4?

Now, abcd must be less than 2500, because 2500*4 = 10000; which is a 5-digit number. So, ‘a’ can be either 1 or 2. But a multiple of 4 has to be even, therefore ‘a’ = 2. Now, the value of ‘d’ has to be 8; because ‘a’ i.e. 2 times 4 is 8.

What does abcabcd*4 = DCBA mean?

ABCD*4 = DCBA implies A must be less than 3 since A is at 1000s place and 3*4 = 12, which makes the given number a five digit number. Thus A can be 1 or 2. Since DCBA is a multiple of 4 it implies that A must be even and hence A is 2. A is 2 again implies D must be 8 or 9.

What is the value of DCBA if a is 2?

Since DCBA is a multiple of 4 it implies that A must be even and hence A is 2. A is 2 again implies D must be 8 or 9. (D cannot be less than 8 since it is at the 1000s place of DCBA, which is multiple of a four digit number of the form 2@#$\%.

What is the units digit of 4*D?

If A= 1 then D= 4 then 4*4= 16 but here required A is 1 so A is 2. Hence, A=2 then D is 8 or 9. D *4 =x2 by this D = 8 (8*4= 32); The answer is “2178”. From the quation from the question i know that a is units digit of 4*d. Since a and d are numbers from 0 to 9 . I can just vary the value if d from 0 to 9 and get corresponding values of a.