Question

Select next number in series: 298 209 129 58 4 (My answer is
a. -13
b. -93
c. -66
d. -57

Answer 1

Hi AS, pls check again and inform if the last number in the series is 4 or -4 ???

Answer 2

last number is 4. thank you

Answer 3

the differences are 298 (89) 209 (80) 129 (71) 58 (54) 4, but i can't find a pattern there.

Answer 4

That is why I asked if the last number was -4 or not

Answer 5

My original answer was -13. But then my friend came up with -66. Think -66 is correct as the spread is 9

Answer 6

If it is -4 then it works out
Each time the number being subtracted decreases by 9

Answer 7

So 58 - 62 = -4
and
-4 - 53 = -57

Answer 8

That looks right on everything, but for the fact that the last number of the actual sequence doesn't fit.

Answer 9

AS, how did yr friend land up with -66?? what's the working??

Answer 10

For all u know, it might be a typo!!

Answer 11

exactly, twice though? i doubt that.

Answer 12

Not from AS, it might be a typo in the printed paper he got

Answer 13

Harkirat. Went back to the math problem. You are very sharp. The last number is a -4. So sorry. Does it make better sense now.

Answer 14

Sure does :)

Answer 15

Do I get two medals for that????

Answer 16

Yes, I gave you the medals...very well deserved. So what is your final answer?
Like i said, originally I had -13 but got lost somewhere

Answer 17

Final answer is -57

Answer 18

Harkirat: Please explain -57.
the differences are 298 (89) 209 (80) 129 (71) 58 (54) -4,

Answer 19

theres a change, because the final is -4, it is 62, not 54, so the difference decreases by 9 between each set, therefore the next one is 62-9=53, so -4-53=-57

Answer 20

See, it goes like this
298 - 89 = 209
209 - 80 = 129
129 - 71 = 58
58 - 62 = -4
-4 -53 = -57
Got it now??

Answer 21

Thank you so much. Yes, I see it now. You both Harkirat & buksbelly are very, very,
sharp. Enjoy the rest of your evening. It's after 1:00 am., in California. Goodnight

Answer 22

Bonne nuit!

Answer 23

Shubh Ratri (Good Night in Hindi )