Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 373 · 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.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) what facts are given (d) your handwriting
2. 2.🧩 Tara is 7 years old. Saanvi is 2 years older than Tara. How old is Saanvi? (a) 10 (b) 9 (c) 2 (d) not enough info
3. 3.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) 90 (b) 18 (c) not enough info (d) 9
4. 4.🧩 A box has 7 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 40 (b) not enough info (c) 12 (d) 35
5. 5.🧩 Kabir bought 6 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) ₹120 (c) not enough info (d) ₹20
6. 6.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 8 PM (c) not enough info (d) 9 PM
7. 7.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) that one dog barked (d) all dogs are mean
8. 8.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
9. 9.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
10. 10.🧩 Saanvi bought 2 mangoes for ₹90 in all. Each mango cost the same. What did one mango cost? (a) ₹90 (b) not enough info (c) ₹45 (d) ₹50
11. 11.🧩 A box has 7 rows of apples, with 4 in each row. How many apples are in the box? (a) 11 (b) 28 (c) 32 (d) not enough info
12. 12.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
13. 13.🧩 A box has 8 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 13 (b) 40 (c) 45 (d) not enough info
14. 14.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
15. 15.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
16. 16.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 40 (b) not enough info (c) 4 (d) 8
17. 17.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
18. 18.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
19. 19.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
20. 20.🧩 Diya is 6 years old. Rohan is 6 years older than Diya. How old is Rohan? (a) not enough info (b) 13 (c) 6 (d) 12
21. 21.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
22. 22.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
23. 23.🧩 Ananya bought 3 kites for ₹135 in all. Each kite cost the same. What did one kite cost? (a) ₹135 (b) ₹50 (c) not enough info (d) ₹45
24. 24.🧩 Vihaan bought 3 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹150 (c) ₹55 (d) ₹50
25. 25.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
26. 26.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
27. 27.🧩 Arjun bought 3 markers and a water bottle for ₹100 in all. Each marker cost the same. What did one marker cost? (a) ₹100 (b) ₹97 (c) ₹33 (d) not enough info
28. 28.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a guess (d) a loud opinion
29. 29.🥭 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) yes, it is certain (c) yes, mangoes match (d) no, check more
30. 30.🧩 A box has 7 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 64 (b) 15 (c) not enough info (d) 56
31. 31.🧩 Diya bought 3 kites and a cap for ₹235 in all. Each kite cost the same. What did one kite cost? (a) ₹232 (b) ₹235 (c) not enough info (d) ₹78
32. 32.🧩 Diya bought 3 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹20 (b) ₹60 (c) not enough info (d) ₹25
33. 33.🧩 Nisha is 12 years old. Kabir is older than Nisha. How old is Kabir? (a) not enough info (b) 17 (c) 14 (d) 13
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.🧩 Tara is 11 years old. Nisha is older than Tara. How old is Nisha? (a) 12 (b) 16 (c) 13 (d) not enough info
36. 36.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) not enough info (b) 10 (c) 5 (d) 50
37. 37.🧩 Nisha bought 3 balls for ₹105 in all. Each ball cost the same. What did one ball cost? (a) ₹40 (b) ₹105 (c) not enough info (d) ₹35
38. 38.🧩 Vihaan is 12 years old. Diya is 2 years older than Vihaan. How old is Diya? (a) 2 (b) not enough info (c) 14 (d) 15
39. 39.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 3 PM (c) not enough info (d) 5 PM
40. 40.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False

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