# Select the number that can replace the question mark (?) in the following series.13, 16, 20, 25, 31, ?

Free Practice With Testbook Mock Tests

## Options:

1. 38

2. 48

3. 37

4. 39

### Correct Answer: Option 1 (Solution Below)

This question was previously asked in

SSC CHSL Previous Paper 107 (Held On: 20 Oct 2020 Shift 3)

## Solution:

Given: 13, 16, 20, 25, 31, ?

13 + 3 = 16

16 + 4 = 20

20 + 5 = 25

25 = 31

31 + 7 = 38

Hence, 38 is correct.
{"ft_lang_label":"__label__en","ft_lang_prob":0.91424304,"math_prob":0.54761547,"size":350,"snap":"2021-31-2021-39","text_gpt3_token_len":134,"char_repetition_ratio":0.10115607,"word_repetition_ratio":0.05263158,"special_character_ratio":0.48,"punctuation_ratio":0.21176471,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9572808,"pos_list":[0,1,2],"im_url_duplicate_count":[null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-07-30T02:03:52Z\",\"WARC-Record-ID\":\"<urn:uuid:22d00a39-d5d2-4c87-b97b-1f6ad3f24ed9>\",\"Content-Length\":\"75675\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:0fd624d7-5281-4c19-8cca-6a0c2cbc7dde>\",\"WARC-Concurrent-To\":\"<urn:uuid:2abedb70-3465-47f8-a553-5f430754c22a>\",\"WARC-IP-Address\":\"104.22.45.238\",\"WARC-Target-URI\":\"https://testbook.com/question-answer/select-the-number-that-can-replace-the-question-ma--5fed71f81fa6e2f76b5185f3\",\"WARC-Payload-Digest\":\"sha1:X45JMXHOMCQLQRDWNVCJLVQ2VKMQBAE3\",\"WARC-Block-Digest\":\"sha1:T6HMPWMLAFWSFNXBW63C3Z3YNYGA5ICI\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-31/CC-MAIN-2021-31_segments_1627046153899.14_warc_CC-MAIN-20210729234313-20210730024313-00043.warc.gz\"}"}