Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 774 · 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.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
2. 2.🧩 A box has 6 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 35 (b) not enough info (c) 30 (d) 11
3. 3.🧩 Ishaan is 7 years old. Saanvi is 8 years older than Ishaan. How old is Saanvi? (a) not enough info (b) 16 (c) 8 (d) 15
4. 4.🧩 Rohan bought 4 balls and a bag for ₹90 in all. Each ball cost the same. What did one ball cost? (a) ₹22 (b) not enough info (c) ₹86 (d) ₹90
5. 5.🧩 Meera bought 2 pens for ₹100 in all. Each pen cost the same. What did one pen cost? (a) ₹100 (b) ₹55 (c) not enough info (d) ₹50
6. 6.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to change answers (d) to waste time
7. 7.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
8. 8.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
9. 9.🧩 Diya bought 2 notebooks and a cap for ₹170 in all. Each notebook cost the same. What did one notebook cost? (a) ₹168 (b) not enough info (c) ₹85 (d) ₹170
10. 10.🧩 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
11. 11.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
12. 12.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
13. 13.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
14. 14.🧩 Nisha is 9 years old. Ananya is 9 years older than Nisha. How old is Ananya? (a) 9 (b) 18 (c) not enough info (d) 19
15. 15.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 4 PM (d) 6 PM
16. 16.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
17. 17.🧩 A box has 3 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) 24 (b) 18 (c) 9 (d) not enough info
18. 18.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 4 PM (c) not enough info (d) 6 PM
19. 19.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
20. 20.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
21. 21.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, it is certain (c) yes, mangoes match (d) no mango is sweet
22. 22.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
23. 23.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
24. 24.🧩 Nisha bought 5 balls for ₹200 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹200 (c) ₹45 (d) ₹40
25. 25.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 18 (b) 9 (c) 90 (d) not enough info
26. 26.🧩 Aarav bought 5 mangoes for ₹175 in all. Each mango cost the same. What did one mango cost? (a) ₹35 (b) ₹40 (c) not enough info (d) ₹175
27. 27.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 5 (b) 50 (c) not enough info (d) 10
28. 28.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
29. 29.🧩 Rohan is 9 years old. Aarav is older than Rohan. How old is Aarav? (a) 14 (b) not enough info (c) 10 (d) 11
30. 30.🧩 Tara bought 3 kites and a cap for ₹210 in all. Each kite cost the same. What did one kite cost? (a) ₹70 (b) ₹207 (c) ₹210 (d) not enough info
31. 31.🧩 Aarav is 6 years old. Kabir is older than Aarav. How old is Kabir? (a) 7 (b) 8 (c) not enough info (d) 11
32. 32.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
33. 33.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) not enough info (b) 14 (c) 70 (d) 7
34. 34.🐕 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
35. 35.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) your handwriting (d) the page number
36. 36.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
37. 37.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 70 (b) 7 (c) not enough info (d) 14
38. 38.🧩 Kabir bought 4 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) not enough info (c) ₹20 (d) ₹60
39. 39.🧩 Diya bought 5 markers and a cap for ₹230 in all. Each marker cost the same. What did one marker cost? (a) ₹225 (b) ₹46 (c) ₹230 (d) not enough info
40. 40.🧩 Rohan bought 6 pens for ₹270 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹270 (c) ₹50 (d) ₹45

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