Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 962 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) yes, it is certain (c) no mango is sweet (d) no, check more
2. 2.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
3. 3.🧩 Vihaan is 11 years old. Arjun is 6 years older than Vihaan. How old is Arjun? (a) 6 (b) 17 (c) 18 (d) not enough info
4. 4.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
5. 5.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
6. 6.🧩 A box has 7 rows of apples, with 4 in each row. How many apples are in the box? (a) 28 (b) not enough info (c) 32 (d) 11
7. 7.🧩 Ananya is 11 years old. Saanvi is 3 years older than Ananya. How old is Saanvi? (a) not enough info (b) 3 (c) 15 (d) 14
8. 8.🧩 Nisha is 8 years old. Vihaan is older than Nisha. How old is Vihaan? (a) 10 (b) 9 (c) not enough info (d) 13
9. 9.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
10. 10.🧩 Ishaan is 11 years old. Ananya is 2 years older than Ishaan. How old is Ananya? (a) not enough info (b) 13 (c) 14 (d) 2
11. 11.🧩 Arjun bought 4 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹60 (c) not enough info (d) ₹15
12. 12.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
13. 13.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
14. 14.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
15. 15.🧩 Saanvi bought 5 kites and a water bottle for ₹270 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹270 (c) ₹54 (d) ₹265
16. 16.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) not enough info (b) 90 (c) 18 (d) 9
17. 17.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
18. 18.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
19. 19.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 8 PM
20. 20.🧩 Nisha is 11 years old. Rohan is 8 years older than Nisha. How old is Rohan? (a) not enough info (b) 20 (c) 8 (d) 19
21. 21.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 8 PM (c) 7 PM (d) not enough info
22. 22.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
23. 23.🧩 Aarav bought 2 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹20 (c) ₹15 (d) ₹30
24. 24.🧩 Rohan bought 3 pens and a cap for ₹165 in all. Each pen cost the same. What did one pen cost? (a) ₹162 (b) ₹55 (c) ₹165 (d) not enough info
25. 25.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
26. 26.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
27. 27.🧩 Diya bought 6 pens and a water bottle for ₹320 in all. Each pen cost the same. What did one pen cost? (a) ₹320 (b) not enough info (c) ₹314 (d) ₹53
28. 28.🧩 Rohan bought 2 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹120 (c) ₹65 (d) ₹60
29. 29.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
30. 30.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
32. 32.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
33. 33.🧩 Saanvi bought 5 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹150 (b) ₹30 (c) ₹35 (d) not enough info
34. 34.🧩 Tara is 6 years old. Rohan is 2 years older than Tara. How old is Rohan? (a) 8 (b) 9 (c) 2 (d) not enough info
35. 35.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
36. 36.🧩 Rohan bought 6 notebooks and a lunch box for ₹330 in all. Each notebook cost the same. What did one notebook cost? (a) ₹55 (b) ₹330 (c) ₹324 (d) not enough info
37. 37.🧩 Saanvi is 12 years old. Ananya is 8 years older than Saanvi. How old is Ananya? (a) 8 (b) 20 (c) not enough info (d) 21
38. 38.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 6 PM (c) not enough info (d) 10 PM
39. 39.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
40. 40.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class

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