Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 749 · 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.🧩 Diya bought 4 pens and a cap for ₹100 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹100 (c) ₹25 (d) ₹96
2. 2.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
3. 3.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
4. 4.🧩 Aarav bought 2 markers and a water bottle for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹118 (b) not enough info (c) ₹60 (d) ₹120
5. 5.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
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.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 10 PM (d) 9 PM
8. 8.🧩 A box has 3 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) not enough info (b) 36 (c) 12 (d) 27
9. 9.🧩 A box has 4 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 9 (b) not enough info (c) 25 (d) 20
10. 10.🧩 A box has 3 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 32 (b) 24 (c) not enough info (d) 11
11. 11.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
12. 12.🧩 A box has 5 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 54 (b) not enough info (c) 14 (d) 45
13. 13.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
14. 14.🧩 Aarav is 11 years old. Nisha is 2 years older than Aarav. How old is Nisha? (a) 14 (b) 13 (c) 2 (d) not enough info
15. 15.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
17. 17.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
18. 18.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 3 PM (c) 2 PM (d) not enough info
19. 19.🧩 Vihaan bought 5 pens and a cap for ₹100 in all. Each pen cost the same. What did one pen cost? (a) ₹20 (b) ₹100 (c) ₹95 (d) not enough info
20. 20.🧩 Ananya bought 2 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) ₹35 (c) not enough info (d) ₹60
21. 21.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
22. 22.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it
23. 23.🧩 Aarav is 9 years old. Nisha is older than Aarav. How old is Nisha? (a) not enough info (b) 11 (c) 14 (d) 10
24. 24.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
25. 25.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) not enough info (b) 12 (c) 6 (d) 60
26. 26.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no, check more (c) yes, mangoes match (d) no mango is sweet
27. 27.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
28. 28.🧩 A box has 6 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 49 (b) 42 (c) not enough info (d) 13
29. 29.🧩 Arjun bought 3 pens and a cap for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹150 (b) not enough info (c) ₹147 (d) ₹50
30. 30.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
31. 31.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
32. 32.🧩 Ananya is 9 years old. Nisha is 7 years older than Ananya. How old is Nisha? (a) 7 (b) 17 (c) 16 (d) not enough info
33. 33.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
34. 34.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
35. 35.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
36. 36.🧩 A box of laddoos has 8 in each row. How many laddoos are in the box? (a) 8 (b) 16 (c) 80 (d) not enough info
37. 37.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
38. 38.🧩 Tara bought 3 pens and a bag for ₹215 in all. Each pen cost the same. What did one pen cost? (a) ₹212 (b) not enough info (c) ₹71 (d) ₹215
39. 39.🧩 A box has 5 rows of apples, with 7 in each row. How many apples are in the box? (a) 42 (b) 35 (c) not enough info (d) 12
40. 40.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True

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