maths problem please help !?
Complete the sequences:
1) 8,12,17,__,13__47.
Second sequence:
2) 15,20,30,__,65,__,120
The answers are:
1) 6 & 9
2) 15 & 25
Thank you and please explain how you oot it!
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Complete the sequences:
1) 8,12,17,__,13__47.
Second sequence:
2) 15,20,30,__,65,__,120
The answers are:
1) 6 & 9
2) 15 & 25
Thank you and please explain how you oot it!
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Answers & Comments
Verified answer
Sequence 2
15,20,30,__,65,__,120
answers are :45 and 90
the difference between two adjacent terms increases as a multiple of 5
so:
20-15=5
30-23=10
45-30=15
65-45=20
90-65=25
120-90=30
Sequence 2
I thought a lot about the first sequence and realised you have made a mistake in the question. the term is 30 not 13
it should be: 8,12,17,__,30,__47
the answers are: 23 & 38
the difference increases by 1 with the next number
12-8=4
17-12=5
23-17=6
30-23=7
38-30=8
47-38=9
2) 15,20,30,__,65,__,120
15+5=20
20+10=30
30+15=45
45+20=65
65+25=90
90+30=120
SIMPLY INCRIMENT WITH 5 AFTER EACH DIGIT