Question
Find the unit digit in (257)45 ×
(248)73.Solution
To find the units digit of (257)45 x (248)773: Units digit of 257 is 7. The pattern for powers of 7 (7, 9, 3, 1) repeats every 4. Since 45 mod 4 = 1, the units digit of 745 is 7. Units digit of 248 is 8. The pattern for powers of 8 (8, 4, 2, 6) repeats every 4. Since 73 mod 4 = 1, the units digit of 873 is 8. Multiply the results: 7 x 8 = 56. Unit digit =6.
If in a number ' 485843698 ', all the digits are arranged in descending order and digits that occur at the same place after rearrangement are dropped, t...
How many small letters are there which are preceded by the numbers in both the sets of the above arrangement?
If all the consonants of the word “WAREHOUSE” are replaced by immediate preceding letter in the alphabetical series, how many vowels are there in th...
Which of the following letter will be 8th letter from the right end if the letters of the word “SURCHARGE’” are arranged in reverse alphabetical o...
If all the prime digits of the number 8695878795 are written first (in increasing order) followed by even digits(in increasing order) and then odd digit...
- If it is possible to make a meaningful English word from 1st, 5 th , 8 th and 10 th letter of the word ‘ADVERTISEMENT�...
If in the word ‘ATMOSPHERE’, all the vowels are changed to the next letter and all the consonants are changed to the previous letter. Which...
In the word ‘ALPHABETICAL’, if all the vowels are replaced by their second succeeding alphabet and all the consonants are replaced by their immediat...
How many such pairs of letters are there in the word INSPIRON each of which has as many letters between them in the words (both in backward and forward ...
How many such pairs of letters are there in the word ‘DISPLACED’ each of which has as many letters between them in the word (in both forwar...
Relevant for Exams:
