Question
How many 4-digit numbers can be formed using digits
1–9 if repetition is not allowed and the number is even?Solution
ATQ,
Units digit even → choices: 2,4,6,8 → 4 choices Remaining 3 digits from remaining 8 digits: permutations 8P3 = 336 Total = 4 × 336 = 1344
In a certain code language, SAFETY is written as 21 – 3 – 8 – 7 – 22 – 27. How will FRIEND be written in that code language?
...If in a certain language KINDLE is coded as ELDNIK, how is FASHION coded in that code?
Which of the following letter will be 6th letter from the left end if the letters at even positions are replaced by succeeding letter in the ...
Arrange the following in the English alphabetical order:
(i) Exploration
(ii) Exploitative
(iii) Exploratory
(iv) Exploitation
Four of the following five are alike in a certain way and hence they form a group. Which one of the following does not belong to that group?
Statement:
Only a few Red are Blue
All Red are Pink
No Yellow is Pink
Conclusion: �...
If CAT is coded as 8 and DEAF is coded as 4, then what is the code for ' FED '?
If all the vowels in the word ‘REJECTION’ are changed to the next letter in the English alphabetical order and all the consonants remain the same th...
Which of the following friends, like Purple ?
In the given series, how many odd numbers are immediately preceded and immediately succeeded by an alphabet?
