Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 397 · 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.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) to be sure of results (d) for fun only
2. 2.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) all dogs are mean (d) never see dogs
3. 3.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 6 PM
4. 4.🧩 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
5. 5.🧩 Meera bought 5 markers for ₹175 in all. Each marker cost the same. What did one marker cost? (a) ₹175 (b) not enough info (c) ₹35 (d) ₹40
6. 6.🧩 Aarav bought 4 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹30 (c) ₹35 (d) ₹120
7. 7.🧩 Saanvi bought 2 balls and a cap for ₹170 in all. Each ball cost the same. What did one ball cost? (a) ₹170 (b) ₹85 (c) ₹168 (d) not enough info
8. 8.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
9. 9.🧩 Arjun bought 4 markers and a bag for ₹130 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹130 (c) ₹32 (d) ₹126
10. 10.🧩 Diya is 8 years old. Ananya is older than Diya. How old is Ananya? (a) 13 (b) not enough info (c) 9 (d) 10
11. 11.🧩 A box has 7 rows of apples, with 5 in each row. How many apples are in the box? (a) not enough info (b) 35 (c) 40 (d) 12
12. 12.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
13. 13.🧩 A box has 3 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 16 (b) not enough info (c) 12 (d) 7
14. 14.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
15. 15.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
16. 16.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
17. 17.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
18. 18.🧩 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
19. 19.🧩 Kabir bought 2 balls and a water bottle for ₹130 in all. Each ball cost the same. What did one ball cost? (a) ₹65 (b) ₹130 (c) ₹128 (d) not enough info
20. 20.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 4 (b) not enough info (c) 8 (d) 40
21. 21.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
22. 22.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) asking your pet (d) guessing
23. 23.🧩 Kabir is 10 years old. Saanvi is older than Kabir. How old is Saanvi? (a) not enough info (b) 15 (c) 11 (d) 12
24. 24.🧩 Nisha bought 2 mangoes for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹65 (b) not enough info (c) ₹60 (d) ₹120
25. 25.🧩 Meera is 12 years old. Aarav is older than Meera. How old is Aarav? (a) 17 (b) 14 (c) 13 (d) not enough info
26. 26.🧩 Ishaan bought 3 kites for ₹165 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) ₹165 (c) not enough info (d) ₹55
27. 27.🥭 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
28. 28.🧩 Diya bought 5 kites and a bag for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹80 (b) ₹16 (c) ₹75 (d) not enough info
29. 29.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 9 PM (d) 10 PM
30. 30.🧩 Diya bought 3 balls and a bag for ₹210 in all. Each ball cost the same. What did one ball cost? (a) ₹207 (b) ₹70 (c) not enough info (d) ₹210
31. 31.🧩 Vihaan bought 5 kites and a water bottle for ₹200 in all. Each kite cost the same. What did one kite cost? (a) ₹195 (b) ₹200 (c) ₹40 (d) not enough info
32. 32.🧩 Kabir is 7 years old. Saanvi is 4 years older than Kabir. How old is Saanvi? (a) not enough info (b) 12 (c) 11 (d) 4
33. 33.🧩 Tara is 11 years old. Rohan is 4 years older than Tara. How old is Rohan? (a) 15 (b) 4 (c) not enough info (d) 16
34. 34.🧩 Nisha is 11 years old. Arjun is 5 years older than Nisha. How old is Arjun? (a) 16 (b) 17 (c) not enough info (d) 5
35. 35.🧩 Nisha bought 4 pens for ₹160 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) ₹160 (c) ₹40 (d) not enough info
36. 36.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
37. 37.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
38. 38.🧩 Ishaan is 9 years old. Saanvi is 7 years older than Ishaan. How old is Saanvi? (a) 7 (b) 17 (c) 16 (d) not enough info
39. 39.🧩 Ishaan is 8 years old. Nisha is older than Ishaan. How old is Nisha? (a) 13 (b) not enough info (c) 10 (d) 9
40. 40.🧩 Diya bought 2 pens and a water bottle for ₹180 in all. Each pen cost the same. What did one pen cost? (a) ₹178 (b) not enough info (c) ₹90 (d) ₹180

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