Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 241 · 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.🧩 Rohan bought 3 markers and a lunch box for ₹100 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹97 (c) ₹33 (d) ₹100
2. 2.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) dogs hate you (d) all dogs are mean
3. 3.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
4. 4.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 5 PM (c) 8 PM (d) not enough info
5. 5.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 16 (b) 8 (c) not enough info (d) 80
6. 6.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
7. 7.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Aarav bought 4 pens for ₹160 in all. Each pen cost the same. What did one pen cost? (a) ₹160 (b) not enough info (c) ₹45 (d) ₹40
9. 9.🧩 Saanvi bought 6 kites for ₹210 in all. Each kite cost the same. What did one kite cost? (a) ₹40 (b) ₹210 (c) ₹35 (d) not enough info
10. 10.🧩 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
11. 11.🧩 Kabir bought 4 mangoes for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹30 (b) ₹35 (c) not enough info (d) ₹120
12. 12.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
13. 13.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
14. 14.🧩 Ishaan is 8 years old. Nisha is 6 years older than Ishaan. How old is Nisha? (a) 15 (b) not enough info (c) 6 (d) 14
15. 15.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) no, check more (c) yes, it is certain (d) yes, mangoes match
16. 16.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 6 PM
17. 17.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 4 PM (c) not enough info (d) 5 PM
18. 18.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
19. 19.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking the whole class (d) asking your pet
20. 20.🧩 Saanvi bought 3 mangoes for ₹75 in all. Each mango cost the same. What did one mango cost? (a) ₹30 (b) ₹75 (c) not enough info (d) ₹25
21. 21.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
22. 22.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
23. 23.🧩 Tara bought 2 balls for ₹100 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) ₹55 (c) not enough info (d) ₹100
24. 24.🧩 Saanvi bought 2 balls and a water bottle for ₹130 in all. Each ball cost the same. What did one ball cost? (a) ₹65 (b) not enough info (c) ₹130 (d) ₹128
25. 25.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
26. 26.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
27. 27.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
28. 28.🧩 Kabir bought 4 mangoes and a bag for ₹170 in all. Each mango cost the same. What did one mango cost? (a) ₹166 (b) not enough info (c) ₹42 (d) ₹170
29. 29.🧩 Saanvi is 6 years old. Tara is 4 years older than Saanvi. How old is Tara? (a) 10 (b) not enough info (c) 4 (d) 11
30. 30.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
31. 31.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
32. 32.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
33. 33.🧩 Saanvi is 6 years old. Vihaan is 6 years older than Saanvi. How old is Vihaan? (a) 6 (b) 13 (c) 12 (d) not enough info
34. 34.🧩 Tara is 11 years old. Ishaan is older than Tara. How old is Ishaan? (a) 16 (b) 12 (c) not enough info (d) 13
35. 35.🧩 A box has 7 rows of eggs, with 9 in each row. How many eggs are in the box? (a) 63 (b) 72 (c) not enough info (d) 16
36. 36.🧩 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
37. 37.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 8 PM
38. 38.🧩 Nisha bought 4 kites and a cap for ₹100 in all. Each kite cost the same. What did one kite cost? (a) ₹100 (b) ₹25 (c) ₹96 (d) not enough info
39. 39.🧩 Vihaan bought 2 pens for ₹110 in all. Each pen cost the same. What did one pen cost? (a) ₹110 (b) not enough info (c) ₹60 (d) ₹55
40. 40.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) your handwriting (d) the page number

Free critical thinking lessons, practice and worksheets at talentjr.in/critical-thinking-for-kids