19, 20, 21, ?, ?, 26, 28, 32, 33, 40
Which two numbers should replace the question marks
Source: Internet
Answer
19, 20, 21, ?, ?, 26, 28, 32, 33, 40
19 , 21 , ? , 28 , 33 ,
+2 +3 +4 +5 21+3=24
20, ? , 26 , 32 , 40
+2 +4 +6 +8 20+2=22
Missing numbers 22,24
In the two numerical sequences below,one number that appears in the top sequence should appear in the bottom sequence and vice versa. Which two numbers should be changed round?
2, 5, 11, 15, 47
3, 7, 23, 31, 63
Answer
2, 5, 11, 15, 47
+3 +6 +4 +32 3 , 6 , 4 , 32 ...... No pattern there it seems.
Let's try the second series.
3, 7, 23, 31, 63
+4 +16 +8 +32 4,16 , 8, 32 ,........ If we change the order of 16 and 8 here it would be
4,8 ,16, 32 ,........
So the series would be 3, 7, 15, 31, 63, .........
If we replace 15 by 23 in the first series,
2, 5, 11, 23, 47
+3 +6 +12 +24 There is also a pattern now.
The numbers to be changed round 15 and 23
The top set of six numbers has a relationship to the set of six numbers below. The two sets of six boxes on the left have the same relationship as the two sets of six boxes on the right. Which set of numbers should therefore replace the question marks?
14 27 56 18 76 32 || 68 64 71 19 25 49
5 9 11 9 13 5 || ? ? ? ? ? ?
Answer
14 27 56 18 76 32 || 68 64 71 19 25 49
5 9 11 9 13 5 || ? ? ? ? ? ?
1+4 =5 1+8=9
2+7=9 7+6=13
5+6=11 3+2=5
6+8=14 6+4=10 7+1=8 1+9=10 2+5=7 4+9=13
14 27 56 18 76 32 || 68 64 71 19 25 49
5 9 11 9 13 5 || 14 10 8 10 7 13
Find out the missing number.
5, 16, 49, ? , 445 , ..................
Answer
Tn = (Tn-1 * 3) +1
16 =(5*3) +1
49= (16*3) +1
? = (49*3) +1 = 148
445= (138 *3) +1
Missing number = 148
7382961 is to 2016
and 3864987 is to 2124
therefore 7958279 is to ?
Answer
7382961 7+3+8 +2=20 9+6+1=16
3864987 3+8 +6+4 =21 9+8+7=24
7958279 7+9+5+8=29 2+7+9=18
Missing number =2918
Some one at office gave another excellent answer.
"2225 I think
The
sum of the individual numbers in 7382961 is 36 1st and 3rd numbers in
2016 added is 3. 4th number plus 2nd number is 6 ie 36
The sum
of the individual numbers in 3864987 is 45 1st and 3rd numbers in 2124
added is 4. 4th number plus 2nd number is 5 ie 45
The sum of the
individual numbers in 7958279 is 47 1st and third number in 2225
added is 4 4th number plus 2nd number is 7 ie 47 "
But that method does not give one specific answer.